http://www.fordmuscle.com/fundamenta...ve/index.shtml

http://www.centuryperformance.com/piston2valve.asp

http://www.marphis.com/p-v_clearance.htm

http://www.rehermorrison.com/techTalk/41.htm

http://www.fordmuscle.com/archives/1...ov/index.shtml